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浙江大学学报(工学版)
浙江大学学报(工学版)  2019, Vol. 53 Issue (4): 724-731    DOI: 10.3785/j.issn.1008-973X.2019.04.013
土木工程、海洋工程     
核电用双钢板-混凝土单元轴心受压组合效应
蒋亚军(),陈思佳,黄城均,宋晓冰*()
上海交通大学 土木工程系，上海 200240
Composite effect of steel-concrete-steel elements underaxial compression for nuclear power plant
Ya-jun JIANG(),Si-jia CHEN,Cheng-jun HUANG,Xiao-bing SONG*()
Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China
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摘要：

为了研究核电用双钢板-混凝土（SCS）结构在轴压荷载作用下钢与混凝土的组合效应，从材料泊松效应的角度出发，分析双钢板-混凝土单元中钢板与混凝土的应力重分布规律，总结钢混组合效应下的2类应力状态和混凝土受侧向约束的特点，采用轴压试验进行论证. 研究表明：钢板与混凝土的应力重分布规律取决于2种材料泊松比的相对变化，对于单轴受压的SCS单元，在达到承载力极限状态时，钢板处于平面压-拉应力状态，混凝土处于三向受压应力状态并存在“约束强化效应”.
关键词： 双钢板-混凝土（SCS）单元;  轴心受压;  泊松效应;  组合效应;  约束强化效应    
Abstract:

The stress redistribution rules of the steel plates and concrete in steel-concrete-steel (SCS) elements under axial compression were analyzed based on Poisson’s effect of materials in order to analyze the composite effect between the steel and concrete in SCS structures under axial compression for nuclear power plants. Two kinds of stress states of the steel plates and concrete, and the lateral constraint stresses of concrete were found from the composite effect. Then the axial compression test results of SCS element were used to demonstrate the theoretical analysis. Results show that the stress redistribution rules of the steel plates and concrete depend on the relative change of the Poisson’s ratio of the two materials. The steel plates are in compression-tension plane stress state and the concrete is in triaxial compression stress state in the limit state of bearing capacity when the SCS element is under axial compression. The " confinement strengthening effect” of concrete is found in SCS element subjected to axial compression.
Key words: steel-concrete-steel (SCS) element    axial compression    Poisson’s effect    composite effect    confinement strengthening effect
收稿日期: 2018-02-06 出版日期: 2019-03-28
CLC:  TU 398  
通讯作者: 宋晓冰     E-mail: yj_jiang@sjtu.edu.cn;xbsong@sjtu.edu.cn
作者简介: 蒋亚军（1994—），男，硕士生，从事钢与混凝土组合结构的研究. orcid.org/0000-0001-8847-5788. E-mail： yj_jiang@sjtu.edu.cn
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引用本文:

蒋亚军,陈思佳,黄城均,宋晓冰. 核电用双钢板-混凝土单元轴心受压组合效应[J]. 浙江大学学报(工学版), 2019, 53(4): 724-731.

Ya-jun JIANG,Si-jia CHEN,Cheng-jun HUANG,Xiao-bing SONG. Composite effect of steel-concrete-steel elements underaxial compression for nuclear power plant. Journal of ZheJiang University (Engineering Science), 2019, 53(4): 724-731.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2019.04.013    或    http://www.zjujournals.com/eng/CN/Y2019/V53/I4/724

图 1  核电站屏蔽厂房中的双钢板-混凝土结构
图 2  钢板与混凝土的泊松比[10-11]
图 3  SCS单元坐标系及应力符号规定
图 4  钢板与混凝土的应力状态
图 5  双钢板-混凝土单元试件
图 6  双钢板-混凝土单元加载装置
图 7  线位移传感器布置
混凝土 钢板 对穿钢筋 栓钉
${f_{{\rm{cu}}}}$/MPa ${t_{\rm{c}}}$/mm ${f_{\rm{y}}}$/MPa ${t_{\rm{s}}}$/mm ${E_{\rm{s}}}$/MPa $f_{\rm{y}}^{\rm{t}}$/MPa ${d_{\rm{t}}}$/mm ${B_{\rm{t}}}$/mm ${d_{\rm{s}}}$/mm ${B_{\rm{s}}}$/mm
42 260 310 2.95 2.04×105 360 10 150 8 75
表 1  SCS单元主要材料参数
图 8  SCS单元破坏实体照片
图 9  单元压荷载-压应变关系曲线
图 10  钢板应力轨迹
图 11  混凝土平面内应力轨迹
图 12  对穿钢筋应力-单元压应变关系曲线
图 13  混凝土压应力-压应变关系曲线
图 14  SCS单元泊松比-压应变关系曲线
文献 编号 ${f_{\rm{c}}}$/MPa ${f_{\rm{y}}}$/MPa ${d_{{\rm{sc}}}}$/mm ${t_{{\rm{sc}}}}$/mm ${t_{\rm{s}}}$/mm ${P_{{\rm{no}}}}$/kN ${P_{{\rm{test}}}}$/kN ${P_{{\rm{no}}}}$/ ${P_{{\rm{test}}}}$
文献[15] SCW-2 26.1 256（332） 1 160 230 4.8（8） 10 653 12 123 0.88
文献[15] SCW-4 26.1 256（332） 1 160 230 4.8（8） 10 653 11 433 0.93
文献[16] SC-100K 23.3 253（343） 684 320 3.2（22） 10 613 11 300 0.94
文献[16] SC-67K 23.3 253（343） 684 320 3.2（22） 10 613 11 800 0.90
文献[17] DSW-4 37.4 370 700 166 3（8） 6 630 7 780 0.85
本文试验 S3-10 33.6 310 800 266 2.95 8 452 9 380 0.90
表 2  规范公式计算承载力与试验值的比较
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